Harsh Metalloys is a trusted manufacturer and supplier of Stainless Steel 347H Bars in Mumbai, India, offering high-performance bars suitable for high-temperature and high-pressure applications. SS 347H is a stabilized austenitic stainless steel with a higher carbon content, designed for enhanced creep resistance and strength at elevated temperatures. These bars are manufactured using premium-quality raw materials and are available in a wide range of diameters, lengths, and finishes. Conforming to ASTM A276 and other international specifications, our 347H stainless steel bars are widely used in critical industries where superior corrosion resistance and thermal stability are essential.
Stainless Steel 347H is alloyed with 17–20% chromium, 9–13% nickel, and columbium (niobium) for stabilization, along with increased carbon (0.04–0.10%) for enhanced high-temperature strength. It offers a tensile strength of approximately 515–750 MPa and yield strength of around 205–275 MPa. The alloy maintains excellent mechanical properties and corrosion resistance even under cyclic heating conditions. It resists intergranular corrosion, making it suitable for welding and forming operations. These mechanical and chemical attributes make SS 347H bars a preferred choice in aggressive thermal and chemical processing environments.
| Specifications | ASTM A276 / ASME SA276 |
| Dimensions | ASTM, ASME |
| Range | 3.17 MM TO 350 MM DIA |
| Diameter | 25mm to 152mm |
| Length | 1 to 6 Meters, Custom Cut Length |
| Finish | Bright, Polish & Black |
| Form | Round, Square, Hex (A/F), Rectangle, Wire (Coil Form), Wiremesh, Billet, Ingot, Forging |
| Condition | Cold Drawn & Polished Cold Drawn, Centreless Ground & Polished |
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
| 347H | min. | 0.04 | – | – | – | – | 17.0 | 3.00 | 9.0 | – |
| max. | 0.10 | 2.0 | 1.00 | 0.045 | 0.030 | 19.0 | 4.00 | 13.0 | – | |
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 347H | 515 | 205 | 40 | 92 | 201 |
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At Harsh Metalloys quality matters. Our Stainless Steel 347H Bars undergo rigorous testing, including tensile strength hardness, corrosion resistance tests so as to be in international standards. We have credible agencies certified thus we furnish material test certificates (MTCs) and third-party inspections. Ensuring reliability and unmatched performance in critical industrial applications.
Stainless Steel 347H Round Bars offer excellent corrosion resistance. Available in sizes ranging from 3mm to 200mm in diameter, these bars are ideal for applications in high-temperature environments due to their stability and durability.
These bars provide outstanding resistance to corrosion and oxidation. Stainless Steel 347H Flat Bars come in thicknesses from 1mm to 50mm and widths from 10mm to 500mm, making them suitable for a variety of industrial uses.
Stainless Steel 347H Square Bars are perfect for high-stress applications. Available in sizes from 5mm to 100mm, they combine excellent mechanical properties with superior resistance to intergranular corrosion.
These bars are highly resistant to corrosion and scaling. Stainless Steel 347H Rectangular Bars are available in thicknesses from 1mm to 50mm and widths from 10mm to 500mm, ideal for structural and mechanical applications.
Stainless Steel 347H Hexagonal Bars offer excellent resistance to high temperatures and corrosion. Available in sizes ranging from 6mm to 75mm, they are widely used in the manufacturing of fasteners and other high-strength components.
These corrosion-resistant bars are available in a range of sizes. Stainless Steel 347H T-Bars provide excellent mechanical strength and are ideal for structural applications requiring high resistance to oxidation and corrosion.
Stainless Steel 347H Bars are extensively used in industries where resistance to heat and corrosion is crucial. Typical applications include heat exchangers, furnace components, boilers, pressure vessels, exhaust manifolds, and petrochemical equipment. The higher carbon content enhances creep strength, making these bars ideal for elevated temperature services such as in refinery reactors and thermal processing systems. SS 347H bars are also used in aerospace, power generation, and chemical processing plants. Harsh Metalloys supplies these bars in various shapes including round, square, and hex, ensuring reliable performance, dimensional precision, and adaptability for complex fabrication needs.
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